The difference in time between zones is ______ .

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问题 The difference in time between zones is ______ .
  
Strange things happen to time when you travel, because the earth is divided into twenty-four time zones, one hour apart. Yon can have days with more or fewer than twenty-four hours, and weeks with more or fewer than seven days.
   If you make a five-day trip across the Atlantic Ocean, your ship enters a different time zone every day. As you enter each zone, the time changes one hour. Traveling west, you set your clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
   If yon travel by shop across the Pacific, you cross the international date line. By agreement, this is the point where a new day begins. When you cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday; traveling west, it is tomorrow.

选项 A、the beginning of any new time zone
B、any point where time changes by one hour
C、the point where a new day begins
D、any time zone in the Pacific Ocean

答案C

解析
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